Pliers.



D. B. SWICKARD.

PLIERS.

APPLICATION FILED JUNE 30. 1915.

l 182,8 1 5 Patented May 9, 1916.

UNITED %TATE% DAN B. SWICKARD, 0F GALVA, ILLINOIS.

PLIERS.

Application filed June 30, 1915.

To all whom it" may concern Be it known that I, DAN B. SWIOKARD, acitizen of the United States, residing at Galva, in the county of Henryand State of Illinois, have invented certain new and useful Improvementsin Pliers; and I do hereby declare the following to be a full, clear,and

exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention is a hand tool in the nature of a combined wrench andpliers having for its object to simplify the construction and toincrease the power of the tool over the ordinary pliers wherein the jawsare permanently and equally pivoted to operate in a predeterminedmanner.

The invention is characterized by the provision of a swinging jawsupported by a link with relation to the other jaw, and means to adjustthe operating capacity of the jaws of the tool.

While different embodiments of the invention are disclosed in theaccompanying drawings, it is to be understood that the constructionstherein disclosed are for the purposes of illustration only and not asdefining the limits of the invention.

In the drawings: Figure 1 is a side elevation of one side of a tool.Fig. 2 is a side elevation of the other side of the tool shown inFig. 1. Fig. 3 is a side elevation of another embodiment of theinvention wherein the link and connecting strap are mounted upon thesame side of the tool. Fig. 4 is an other embodiment of the inventionwherein the handle is provided with the teeth for the rack.

In the embodiment illustrated in Figs. 1 and 2, the tool is showncomprising a plurality of members, the upper member 1 terminating in alower jaw 2, the lower member 3 terminating in an upper jaw l. A link 5,which may be of any preferred form, is shown pivotally connected at 6 tothe upper member 1 at the rear 9f its jaw 2, and preferably on theinclined portion 6 of said upper member. If desired, this inclinedportion may be thickened to give increased strength to the tool. In thisfigure of the drawing, the link is shown curved upwardly and forwardlyfrom its pivotal point 6 to a position in advance of said pivotal point6, where the link 5 is pivotally connected at 8 to the up per jaw 4. Thepivotal connection 6 does not extend through both members 1 and 3,

Specification of Letters Patent.

Patented May 9,1216.

Serial No. 37,203.

but merely through the member 1. The link 5 isshown provided with anoffset 9 serving asmeans to pivotally connect a threaded rod 10 whichmay have sliding engagement with a. yoke 11 supported by the uppermember 1.v This yoke may be formed integral with a connecting strap 12which is rigidly secured to the lower jaw 2 at 13, as illustrated inFig. 2. lVithin the yoke may be mounted a rotatable threaded nut 1 1which is adapted to engage the rod 10 for the purpose of moving the rodto various positions with relation to the upper member 1 and inconsequence drawing the upper jaw 4 to various positions with relationto the lower jaw. By rotating the nut 14 to draw the rack farther to theright in Fig. 1, the upper jaw 4 will be lifted upwardly and rearwardlywith. relation to the lower jaw 2, and by virtue of its swingingconnection with said lower jaw will increase the distance between theengaging surfaces of the two jaws, as will be readily understood. Thisaction enables a mechanic or operator to use the tool on rods orv pipesof large diameter. When a rod or pipe of small diameter is to be engagedby the tool, the nut 14 is rotated to move the rod to the left until thejaws firmly are into contact with the object to be engaged, whereuponthe handles may be contracted to bring the j aws into frictionalengagement with the rod or pipe in theusual manner. It is obvious thatthe yoke 11 may be formed as an integral part of the upper member 1 ifso desired, or may be made separately therefrom and secured thereto 'byany suitable means.

In the embodiment of Fig. 3, the link 15. is similar to the link 5 ofFig. 1, but is shown positioned upon the same side of the tool as thestrap 12. In this form of the device, as in the form in Figs. 1 and 2,the lower member 3 is mounted for swinging engagement with relation tothe upper member 1, and is pivotally mounted from the link whichsupports the variable controlling mechanism 1014 carried by the uppermember.

In the embodiment of the invention illustrated in Fig. 4, the uppermember 1 is provided with the usual jaw 2, and in addition thereto thehandle is formed with a threaded rod 16. The link 5 is connected to thelower jaw 2 and to the upper jaw 4 in the manner described in Figs. 1and 2, but a connecting link 17 is shown pivotally mounted at 18 llf)Iunl

to the link 5 and pivoted at 19 to 'a yoke 20, which is slidably mountedupon the handle of member 1. This yoke 20 may be employed to inclose orhouse a suitable rotatable element such as an adjusting nut 21 similarto the nut 1d of Figs. 1 to 8. The same relative action is secured inthis form of device as in the other figures, namely, the swingingpivotal movement of one jaw with relation to its cooperating jaw.Increased power is obtained by this form of pliers over the ordinarystraight nose pliers having a single central pivot for the two jaws.This increased power is due to the construction wherein the connectinglink 5 is so mounted that it, and the lower jaw 2 are substantially Ithas been found in operation that when the position of the jaws has beenvaried by means of the nut 1 1 and rod 10, to contact firmly with theobject to be operated upon, the lower member 2 may be grasped at thehandle part thereof and the object may be turned without touching theupper handle, the jaws being drawn tightly over the object such as apipe, as increased stress is applied to the lever handle. The tool,however, is designed to be grasped by both of the handle members 1 and 3whereby a firm hold and greater power can be efiected than in a toolwherein the jaws are permanently fixedwith relation to each other.

It is obvious that various changes may be made in the form andproportion of the parts, and the right is reserved to make such changesand alterations as fairly fall within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A tool of the class described comprising a plurality of members eachhaving a jaw, a link pivotally mounted on one member near the rear endof the jaw, and pivoted to the other member near the central part of thejaw, and a threaded element adjustable longitudinally of the jaw to varythe operative position of the jaws.

2. A tool of the class described comprising a plurality of members eachhaving a jaw, a link pivotally mounted on one member near the rear endof the jaw, and pivoted to the other member near the central part of thejaw, and a threaded element pivotally connected with the link near thecentral part of said last named jaw to vary the operative position ofthe jaws.

3. A tool of the class described comprising a plurality of crossingmembers each having a handle and a jaw, a link pivoted to one member ata point substantially where it crosses its adjacent member, said linkbeing pivoted to the other member at the jaw, a threaded element to varythe operative position of the jaws and handles, and pivotal connectionbetween the threaded element and the link.

4. A tool of the class described comprising a plurality of crossingmembers each formed into a handle and a jaw, a link pivoted to one ofthe members at substantially the point of crossing of said members, saidlink being pivotally mounted to the other of said members forwardly ofthe first named pivotal connection to permit of swinging movement withrelation to the first named member, a threaded element carried by one ofsaid members and having pivotal connection with said link, and arotatable element to engage the threaded element to vary the operativeposition of said jaws.

5. A tool of the class described comprising a plurality of crossingmembers each formed into a handle and a jaw, a link pivoted to onemember near the base of its jaw and extending upwardly and forwardly forpivotal connection with the other jaw in advance of the crossing of themembers, a threaded rod pivoted to said link above the jaw, and means toengage the rod to vary the position of one of said jaws.

6. A tool of the class described comprising a plurality of crossingmembers each having a handle and a jaw, one of said members beingprovided with a slot adjacent to the jaw to permit of loosely mountingthe other member, a plate to guide the movement of the loosely mountedmember, a link connected with the loosely mounted member substantiallyat the point where it crosses the other member, and connected to theother member at the jaw, and a threaded rod pivoted to the link andadjustably connected with the handle to vary the position of the jawsindependently of the movement imparted to the jaws by the handle.

In testimony whereof, I aiiix my signature, in presence of twowitnesses.

DAN B. SWICKARD. lVitnesses C. I. GIBBS, D. A. lVEs'r.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

